Lighting device



FIG. 1 is a front perspective view of an embodiment of a lighting device showing my new design;

FIG. 2 is a rear perspective view thereof;

FIG. 3 is a front view thereof;

FIG. 4 is a rear view thereof;

FIG. 5 is a top view thereof;

FIG. 6 is a bottom view thereof;

FIG. 7 is a left side view thereof; and,

FIG. 8 is a right side view thereof.

The broken line portions shown in FIGS. 1 to 8 are for illustrative purposes only and form no part of the claimed design. 

The ornamental design for a lighting device, as shown and described. 